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<h1 class="h3" id="the-worlds-largest-open-source-foundation">The World's Largest Open Source Foundation<a class="headerlink" href="https://www.apache.org/www_apache_default.html#the-worlds-largest-open-source-foundation" title="Permalink">&para;</a></h1>
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<p><a href="https://s.apache.org/FY2020AnnualReport-PR"><strong>$22B+ worth of Apache Open Source software products are made available to the public-at-large at 100% no cost, and benefit billions of users around the&nbsp;world.</strong></a></p>
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<li><a href="https://projects.apache.org/projects.html?category#big-data">Big Data</a></li>
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</li>
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<li><a href="https://projects.apache.org/projects.html?category#osgi">OSGi</a></li>
<li><a href="https://projects.apache.org/projects.html?category#regexp">RegExp</a></li>
<li><a href="https://projects.apache.org/projects.html?category#retired">Retired</a></li>
<li><a href="https://projects.apache.org/projects.html?category#search">Search</a></li>
<li><a href="https://projects.apache.org/projects.html?category#security">Security</a></li>
<li><a href="https://projects.apache.org/projects.html?category#sql">SQL</a></li>
<li><a href="https://projects.apache.org/projects.html?category#testing">Testing</a></li>
<li><a href="https://projects.apache.org/projects.html?category#virtual-machine">Virtual-machine</a></li>
<li><a href="https://projects.apache.org/projects.html?category#web-framework">Web-framework</a></li>
<li><a href="https://projects.apache.org/projects.html?category#xml">XML</a></li>
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<div class="row">
<div class="col-lg-6 col-md-12 border-right">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://httpd.apache.org/" title="Apache Web Server (httpd)">HTTP Server</a></li>
<li class="letter-header">A</li>
<li><a href="http://apisix.apache.org" title="a cloud-native microservices API gateway">APISIX</a></li>
<li><a href="http://accumulo.apache.org/" title="Sorted, distributed key/value store">Accumulo</a></li>
<li><a href="http://activemq.apache.org/" title="Distributed Messaging System">ActiveMQ</a></li>
<li><a href="http://airavata.apache.org/" title="Workflow and Computational Job Management Middleware">Airavata</a></li>
<li><a href="http://airflow.apache.org/" title="workflow automation and scheduling that can be used to author and manage data pipelines">Airflow</a></li>
<li><a href="http://allura.apache.org/" title="Forge software for hosting software projects">Allura</a></li>
<li><a href="http://ambari.apache.org/" title="Hadoop cluster management">Ambari</a></li>
<li><a href="http://ant.apache.org/" title="Java-based build tool">Ant</a></li>
<li><a href="http://any23.apache.org/" title="Anything to Triples">Any23</a></li>
<li><a href="http://archiva.apache.org/" title="Build Artifact Repository Manager">Archiva</a></li>
<li><a href="http://aries.apache.org/" title="Enterprise OSGi application programming model">Aries</a></li>
<li><a href="http://arrow.apache.org/" title="Powering Columnar In-Memory Analytics">Arrow</a></li>
<li><a href="http://asterixdb.apache.org/" title="open source Big Data Management System">AsterixDB</a></li>
<li><a href="http://atlas.apache.org/" title="scalable and extensible set of core foundational governance services">Atlas</a></li>
<li><a href="http://attic.apache.org/" title="A home for dormant projects">Attic</a></li>
<li><a href="http://avro.apache.org/" title="A Serialization System">Avro</a></li>
<li><a href="http://axis.apache.org/" title="Java SOAP Engine">Axis</a></li>
<li class="letter-header">B</li>
<li><a href="http://bval.apache.org/" title="JSR-303 Bean Validation Implementation and Extensions">BVal</a></li>
<li><a href="http://bahir.apache.org/" title="Extensions to distributed analytic platforms such as Apache Spark">Bahir</a></li>
<li><a href="http://beam.apache.org/" title="Programming model, SDKs, and runners for defining and executing data processing pipelines">Beam</a></li>
<li><a href="http://bigtop.apache.org/" title="Apache Hadoop ecosystem integration and distribution project">Bigtop</a></li>
<li><a href="http://bloodhound.apache.org/" title="Issue tracking, wiki and repository browser">Bloodhound</a></li>
<li><a href="http://bookkeeper.apache.org/" title="Replicated log service which can be used to build replicated state machines">BookKeeper</a></li>
<li><a href="http://brooklyn.apache.org/" title="Framework for modeling, monitoring, and managing applications through autonomic blueprints">Brooklyn</a></li>
<li><a href="http://buildr.apache.org/" title="Simple and intuitive build system for Java applications">Buildr</a></li>
<li class="letter-header">C</li>
<li><a href="http://cxf.apache.org/" title="Service Framework">CXF</a></li>
<li><a href="http://calcite.apache.org/" title="Dynamic data management framework">Calcite</a></li>
<li><a href="http://camel.apache.org/" title="Spring based Integration Framework which implements the Enterprise Integration Patterns">Camel</a></li>
<li><a href="http://carbondata.apache.org/" title="indexed columnar data format for fast analytics on big data platform">CarbonData</a></li>
<li><a href="http://cassandra.apache.org/" title="Highly scalable second-generation distributed database">Cassandra</a></li>
<li><a href="http://cayenne.apache.org/" title="User-friendly Java ORM with Tools">Cayenne</a></li>
<li><a href="http://celix.apache.org/" title="Implementation of the OSGi specification adapted to C">Celix</a></li>
<li><a href="http://chemistry.apache.org/" title="CMIS (Content Managment Interoperability Services) Clients and Servers">Chemistry</a></li>
<li><a href="http://clerezza.apache.org/" title="Semantically linked data for OSGi">Clerezza</a></li>
</ul>
</div>
<div class="col-lg-6 col-md-12 border-right">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://cloudstack.apache.org/" title="Infrastructure as a Service solution">CloudStack</a></li>
<li><a href="http://cocoon.apache.org/" title="Web development framework: separation of concerns, component-based">Cocoon</a></li>
<li><a href="http://commons.apache.org/" title="Reusable Java components">Commons</a></li>
<li><a href="http://community.apache.org/" title="Resources to help people become involved with Apache projects">Community Development</a></li>
<li><a href="http://cordova.apache.org/" title="Platform for building native mobile applications using HTML, CSS and JavaScript">Cordova</a></li>
<li><a href="http://couchdb.apache.org/" title="RESTful document database">CouchDB</a></li>
<li><a href="http://creadur.apache.org/" title="Comprehension and auditing of software distributions">Creadur</a></li>
<li><a href="http://curator.apache.org/" title="Java libraries that make using Apache ZooKeeper easier">Curator</a></li>
<li><a href="http://ctakes.apache.org/" title="Natural language processing (NLP) tool for information extraction from electronic medical record clinical free-text">cTAKES</a></li>
<li class="letter-header">D</li>
<li><a href="http://db.apache.org/" title="Database access">DB</a></li>
<li><a href="http://daffodil.apache.org" title="an implementation of the Data Format Description Language (DFDL) used to convert between fixed format data and more readily processed forms such as XML or JSON">Daffodil</a></li>
<li><a href="http://datafu.apache.org/" title="well-tested libraries that help developers solve common data problems in Hadoop and similar distributed systems">DataFu</a></li>
<li><a href="http://datasketches.apache.org" title='an open source, high-performance library of streaming algorithms commonly called "sketches" in the data sciences. Sketches are small, stateful programs that process massive data as a stream and can provide approximate answers, with mathematical guarantees, to computationally difficult queries orders-of-magnitude faster than traditional, exact methods'>DataSketches</a></li>
<li><a href="http://deltaspike.apache.org/" title="Portable CDI extensions that provide useful features for Java application developers">DeltaSpike</a></li>
<li><a href="http://directory.apache.org/" title="Apache Directory Server">Directory</a></li>
<li><a href="http://dolphinscheduler.apache.org" title="a distributed and extensible workflow scheduler platform with powerful DAG visual interfaces">DolphinScheduler</a></li>
<li><a href="http://drill.apache.org/" title="Schema-free SQL Query Engine for Apache Hadoop, NoSQL and Cloud Storage">Drill</a></li>
<li><a href="http://druid.apache.org" title="analytical database software">Druid</a></li>
<li><a href="http://dubbo.apache.org/" title="a high-performance, lightweight, java based RPC framework.">Dubbo</a></li>
<li class="letter-header">E</li>
<li><a href="http://echarts.apache.org" title="a charting and data visualization library written in JavaScript">ECharts</a></li>
<li><a href="http://empire-db.apache.org/" title="Relational Data Persistence">Empire-db</a></li>
<li class="letter-header">F</li>
<li><a href="http://felix.apache.org/" title="OSGi Framework and components.">Felix</a></li>
<li><a href="http://fineract.apache.org/" title="Platform for Digital Financial Services">Fineract</a></li>
<li><a href="http://flex.apache.org/" title="Application framework for expressive web applications that deploy to all major browsers, desktops and devices.">Flex</a></li>
<li><a href="http://flink.apache.org/" title="platform for scalable batch and stream data processing">Flink</a></li>
<li><a href="http://flume.apache.org/" title="A reliable service for efficiently collecting, aggregating, and moving large amounts of log data">Flume</a></li>
<li><a href="http://fluo.apache.org/" title="Storage and incremental processing of large data sets">Fluo</a></li>
<li><a href="http://freemarker.apache.org/" title="a template engine.">FreeMarker</a></li>
<li class="letter-header">G</li>
<li><a href="http://geode.apache.org/" title="Low latency, high concurrency data management solutions">Geode</a></li>
<li><a href="http://geronimo.apache.org/" title="Java2, Enterprise Edition (J2EE) container">Geronimo</a></li>
<li><a href="http://giraph.apache.org/" title="Iterative graph processing system built for high scalability">Giraph</a></li>
<li><a href="http://gobblin.apache.org" title="a distributed data integration framework that simplifies common aspects of big data integration such as data ingestion, replication, organization and lifecycle management for both streaming and batch data ecosystems">Gobblin</a></li>
<li><a href="http://gora.apache.org/" title="ORM framework for column stores such as Apache HBase and Apache Cassandra with a specific focus on Hadoop">Gora</a></li>
<li><a href="http://griffin.apache.org/" title="a data quality solution for big data, including both streaming and batch mode. It offers an unified process to measure data quality from different perspectives.">Griffin</a></li>
</ul>
</div>
</div>
</div>
<div class="col-lg-4 col-sm-4">
<div class="row">
<div class="col-lg-6 col-md-12 border-right">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://groovy.apache.org/" title="A multi-faceted language for the Java platform">Groovy</a></li>
<li><a href="http://guacamole.apache.org/" title="providing performant, browser-based remote access">Guacamole</a></li>
<li><a href="http://gump.apache.org/" title="Continuous integration of open source projects">Gump</a></li>
<li class="letter-header">H</li>
<li><a href="http://hawq.apache.org/" title="a Hadoop native SQL query engine that combines the key technological advantages of an MPP database with the scalability and convenience of Hadoop">HAWQ</a></li>
<li><a href="http://hbase.apache.org/" title="Apache Hadoop Database">HBase</a></li>
<li><a href="http://hadoop.apache.org/" title="Distributed computing platform">Hadoop</a></li>
<li><a href="http://helix.apache.org/" title="A cluster management framework for partitioned and replicated distributed resources">Helix</a></li>
<li><a href="http://hive.apache.org/" title="Data warehouse infrastructure using the Apache Hadoop Database">Hive</a></li>
<li><a href="http://hc.apache.org/" title="Java toolset of low level HTTP components">HttpComponents</a></li>
<li><a href="http://hudi.apache.org" title="providing atomic upserts and incremental data streams on Big Data">Hudi</a></li>
<li class="letter-header">I</li>
<li><a href="http://iceberg.apache.org" title="managing huge analytic datasets using a standard at-rest table format that is designed for high performance and ease of use">Iceberg</a></li>
<li><a href="http://ignite.apache.org/" title="High-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time">Ignite</a></li>
<li><a href="http://impala.apache.org/" title="a high-performance distributed SQL engine">Impala</a></li>
<li><a href="http://incubator.apache.org/" title="Entry path for projects and codebases wishing to become part of the Foundation's efforts">Incubator</a></li>
<li><a href="http://iotdb.apache.org" title="an IoT native database with high performance for data management and analysis">IoTDB</a></li>
<li><a href="http://isis.apache.org/" title="Framework for rapidly developing domain-driven apps in Java">Isis</a></li>
<li class="letter-header">J</li>
<li><a href="http://jmeter.apache.org/" title="Java performance and functional testing">JMeter</a></li>
<li><a href="http://jspwiki.apache.org/" title="Leading open source WikiWiki engine, feature-rich and built around standard J2EE components (Java, servlets, JSP)">JSPWiki</a></li>
<li><a href="http://jackrabbit.apache.org/" title="Content Repository for Java">Jackrabbit</a></li>
<li><a href="http://james.apache.org/" title="Java Apache Mail Enterprise Server">James</a></li>
<li><a href="http://jena.apache.org/" title="Java framework for building Semantic Web applications">Jena</a></li>
<li><a href="http://johnzon.apache.org/" title="JSR-353 compliant JSON parsing; modules to help with JSR-353 as well as JSR-374 and JSR-367">Johnzon</a></li>
<li><a href="http://joshua.apache.org/" title="statistical and other forms of machine translation.">Joshua</a></li>
<li><a href="http://juneau.apache.org/" title="a toolkit for marshalling POJOs to a wide variety of content types using a common framework, and for creating sophisticated self-documenting REST interfaces and microservices using VERY little code">Juneau</a></li>
<li><a href="http://juddi.apache.org/" title="Java implementation of the Universal Description, Discovery, and Integration specification">jUDDI</a></li>
<li><a href="http://jclouds.apache.org/" title="Java cloud APIs and abstractions">jclouds</a></li>
<li class="letter-header">K</li>
<li><a href="http://kafka.apache.org/" title="Distributed publish-subscribe messaging system">Kafka</a></li>
<li><a href="http://karaf.apache.org/" title="Server-side OSGi distribution">Karaf</a></li>
<li><a href="http://kibble.apache.org/" title="an interactive project activity analyzer and aggregator">Kibble</a></li>
<li><a href="http://knox.apache.org/" title="Simplify and normalize the deployment and implementation of secure Hadoop clusters">Knox</a></li>
<li><a href="http://kudu.apache.org/" title="A distributed columnar storage engine built for the Apache Hadoop ecosystem">Kudu</a></li>
<li><a href="http://kylin.apache.org/" title="Extreme OLAP Engine for Big Data">Kylin</a></li>
<li class="letter-header">L</li>
<li><a href="http://libcloud.apache.org/" title="Unified interface to the cloud">Libcloud</a></li>
</ul>
</div>
<div class="col-lg-6 col-md-12 border-right">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://logging.apache.org/" title="Cross-language logging services">Logging Services</a></li>
<li><a href="http://lucene.apache.org/" title="Search engine library">Lucene</a></li>
<li><a href="http://lucenenet.apache.org/" title="Search engine library targeted at .NET runtime users.">Lucene.Net</a></li>
<li class="letter-header">M</li>
<li><a href="http://madlib.apache.org/" title="Scalable, Big Data, SQL-driven machine learning framework for Data Scientists">MADlib</a></li>
<li><a href="http://mina.apache.org/" title="Multipurpose Infrastructure for Network Application">MINA</a></li>
<li><a href="http://mahout.apache.org/" title="Scalable machine learning library">Mahout</a></li>
<li><a href="http://manifoldcf.apache.org/" title="Framework for connecting source content repositories to target repositories or indexes.">ManifoldCF</a></li>
<li><a href="http://maven.apache.org/" title="Java project management and comprehension tools">Maven</a></li>
<li><a href="http://mesos.apache.org/" title="a cluster manager that provides efficient resource isolation and sharing across distributed applications">Mesos</a></li>
<li><a href="http://mnemonic.apache.org/" title="a transparent nonvolatile hybrid memory oriented library for Big data, High-performance computing, and Analytics">Mnemonic</a></li>
<li><a href="http://myfaces.apache.org/" title="JavaServer(tm) Faces implementation and components">MyFaces</a></li>
<li><a href="http://mynewt.apache.org/" title="embedded OS optimized for networking and built for remote management of constrained devices">Mynewt</a></li>
<li class="letter-header">N</li>
<li><a href="http://netbeans.apache.org/" title="development environment, tooling platform, and application framework">NetBeans</a></li>
<li><a href="http://nifi.apache.org/" title="Easy to use, powerful, and reliable system to process and distribute data">NiFi</a></li>
<li><a href="http://nutch.apache.org/" title="Open Source Web Search Software">Nutch</a></li>
<li class="letter-header">O</li>
<li><a href="http://ofbiz.apache.org/" title="Enterprise automation software">OFBiz</a></li>
<li><a href="http://oodt.apache.org/" title="Object Oriented Data Technology (middleware metadata)">OODT</a></li>
<li><a href="http://orc.apache.org/" title="the smallest, fastest columnar storage for Hadoop workloads">ORC</a></li>
<li><a href="http://olingo.apache.org/" title="OASIS OData protocol libraries">Olingo</a></li>
<li><a href="http://oozie.apache.org/" title="A workflow scheduler system to manage Apache Hadoop jobs.">Oozie</a></li>
<li><a href="http://openjpa.apache.org/" title="Object Relational Mapping for Java">OpenJPA</a></li>
<li><a href="http://openmeetings.apache.org/" title="Web-Conferencing and real-time collaboration">OpenMeetings</a></li>
<li><a href="http://opennlp.apache.org/" title="Machine learning based toolkit for the processing of natural language text">OpenNLP</a></li>
<li><a href="http://openoffice.apache.org/" title="An open-source, office-document productivity suite">OpenOffice</a></li>
<li><a href="http://openwebbeans.apache.org/" title="JSR-299 Context and Dependency Injection for Java EE Platform Implementation">OpenWebBeans</a></li>
<li><a href="http://openwhisk.apache.org/" title="a platform for building serverless applications with functions">OpenWhisk</a></li>
<li><a href="http://ozone.apache.org" title="a distributed object store for Hadoop-based and Cloud-native environments">Ozone</a></li>
<li class="letter-header">P</li>
<li><a href="http://pdfbox.apache.org/" title="Java library for working with PDF documents">PDFBox</a></li>
<li><a href="http://plc4x.apache.org/" title="a set of libraries for communicating with industrial programmable logic controllers (PLCs) using a variety of protocols but with a shared API">PLC4X</a></li>
<li><a href="http://poi.apache.org/" title="Java API for OLE 2 Compound and OOXML Documents">POI</a></li>
<li><a href="http://parquet.apache.org/" title="columnar storage format available to any project in the Apache Hadoop ecosystem">Parquet</a></li>
<li><a href="http://perl.apache.org/" title="Dynamic websites using Perl">Perl</a></li>
<li><a href="http://petri.apache.org" title="assessment of, education in, and adoption of the Foundation's policies and procedures for collaborative development and the pros and cons of joining the Foundation">Petri</a></li>
<li><a href="http://phoenix.apache.org/" title="High performance relational database layer over Apache HBase for low latency applications">Phoenix</a></li>
</ul>
</div>
</div>
</div>
<div class="col-lg-4 col-sm-4">
<div class="row">
<div class="col-lg-6 col-md-12 border-right">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://pig.apache.org/" title="Platform for analyzing large data sets">Pig</a></li>
<li><a href="http://pinot.apache.org" title="distributed OLAP data store to provide Real-time Analytics to power wide variety of analytical use case">Pinot</a></li>
<li><a href="http://pivot.apache.org/" title="Rich Internet applications in Java">Pivot</a></li>
<li><a href="http://apr.apache.org/" title="Apache Portable Runtime libraries">Portable Runtime (APR)</a></li>
<li><a href="http://portals.apache.org/" title="Portal technology">Portals</a></li>
<li><a href="http://pulsar.apache.org/" title="highly scalable, low latency messaging platform running on commodity hardware">Pulsar</a></li>
<li class="letter-header">Q</li>
<li><a href="http://qpid.apache.org/" title="Multiple language implementation of the latest Advanced Message Queuing Protocol (AMQP)">Qpid</a></li>
<li class="letter-header">R</li>
<li><a href="http://reef.apache.org/" title="Retainable Evaluator Execution Framework">REEF</a></li>
<li><a href="http://ranger.apache.org/" title="framework to enable, monitor and manage comprehensive data security across the Hadoop platform.">Ranger</a></li>
<li><a href="http://ratis.apache.org" title="a highly customizable Raft protocol implementation in Java">Ratis</a></li>
<li><a href="http://river.apache.org/" title="Jini service oriented architecture">River</a></li>
<li><a href="http://rocketmq.apache.org/" title="a fast, low latency, reliable, scalable, distributed, easy to use message-oriented middleware, especially for processing large amounts of streaming data">RocketMQ</a></li>
<li><a href="http://roller.apache.org/" title="Java blog server">Roller</a></li>
<li><a href="http://royale.apache.org/" title="improving developer productivity in creating applications for wherever Javascript runs (and other runtimes)">Royale</a></li>
<li><a href="http://rya.apache.org/" title="scalable storage, retrieval, and analysis of RDF data">Rya</a></li>
<li class="letter-header">S</li>
<li><a href="http://singa.apache.org/" title="a distributed deep learning platform">SINGA</a></li>
<li><a href="http://sis.apache.org/" title="Spatial Information System">SIS</a></li>
<li><a href="http://samza.apache.org/" title="distributed stream processing framework">Samza</a></li>
<li><a href="http://santuario.apache.org/" title="XML Security in Java and C++">Santuario</a></li>
<li><a href="http://serf.apache.org/" title="High performance C-based HTTP client library built upon the Apache Portable Runtime (APR) library">Serf</a></li>
<li><a href="http://servicecomb.apache.org/" title="a microservice framework that provides a set of tools and components to make development and deployment of cloud applications easier.">ServiceComb</a></li>
<li><a href="http://servicemix.apache.org/" title="Enterprise Service Bus">ServiceMix</a></li>
<li><a href="http://shardingsphere.apache.org" title="a database clustering system providing data sharding, distributed transactions, and distributed database management">ShardingSphere</a></li>
<li><a href="http://shiro.apache.org/" title="Powerful and easy-to-use application security framework">Shiro</a></li>
<li><a href="http://skywalking.apache.org/" title="application performance management and monitoring (APM)">SkyWalking</a></li>
<li><a href="http://sling.apache.org/" title="Web Framework for JCR Content Repositories">Sling</a></li>
<li><a href="http://solr.apache.org" title="highly scalable distributed document search and analytics">Solr</a></li>
<li><a href="http://spamassassin.apache.org/" title="Mail filter to identify spam">SpamAssassin</a></li>
<li><a href="http://spark.apache.org/" title="Fast and general engine for large-scale data processing">Spark</a></li>
<li><a href="http://steve.apache.org/" title="Python based single transferable vote software system">Steve</a></li>
<li><a href="http://storm.apache.org/" title="Distributed, real-time computation system">Storm</a></li>
<li><a href="http://streams.apache.org/" title="interoperability of online profiles and activity feeds">Streams</a></li>
<li><a href="http://struts.apache.org/" title="Model 2 framework for building Java web applications">Struts</a></li>
<li><a href="http://submarine.apache.org/" title="allowing infrastructure engineers and data scientists to build deep learning applications (TensorFlow, PyTorch, etc.) end to end on cluster management platforms (like YARN/K8s)">Submarine</a></li>
<li><a href="http://subversion.apache.org/" title="Version Control">Subversion</a></li>
</ul>
</div>
<div class="col-lg-6 col-md-12">
<ul class="list-unstyled" style="margin-bottom: 0px;">
<li><a href="http://superset.apache.org" title="data exploration, analysis, visualization, and dashboarding">Superset</a></li>
<li><a href="http://synapse.apache.org/" title="Enterprise Service Bus and Mediation Framework">Synapse</a></li>
<li><a href="http://syncope.apache.org/" title="Managing digital identities in enterprise environments">Syncope</a></li>
<li><a href="http://systemds.apache.org/" title="A machine learning platform optimal for big data">SystemDS</a></li>
<li class="letter-header">T</li>
<li><a href="http://tvm.apache.org" title="compilation of machine learning models to run on a wide range of hardware platforms">TVM</a></li>
<li><a href="http://tapestry.apache.org/" title="Component-based Java Web Application Framework">Tapestry</a></li>
<li><a href="http://tcl.apache.org/" title="Dynamic websites using TCL">Tcl</a></li>
<li><a href="http://tez.apache.org/" title="High-performance and scalable distributed data processing framework">Tez</a></li>
<li><a href="http://thrift.apache.org/" title="Framework for scalable cross-language services development">Thrift</a></li>
<li><a href="http://tika.apache.org/" title="Content Analysis and Detection Toolkit">Tika</a></li>
<li><a href="http://tinkerpop.apache.org/" title="A graph computing framework for both graph databases (OLTP) and graph analytic systems (OLAP)">TinkerPop</a></li>
<li><a href="http://tomee.apache.org/" title="Java EE Web Profile built on Apache Tomcat">TomEE</a></li>
<li><a href="http://tomcat.apache.org/" title="A Java Servlet and JSP Container">Tomcat</a></li>
<li><a href="http://trafficcontrol.apache.org/" title="building, monitoring, configuring, and provisioning a large scale content delivery network (CDN)">Traffic Control</a></li>
<li><a href="http://trafficserver.apache.org/" title="A fast, scalable and extensible HTTP/1.1 compliant caching proxy server">Traffic Server</a></li>
<li><a href="http://turbine.apache.org/" title="A Java Servlet Web Application Framework and associated component library">Turbine</a></li>
<li class="letter-header">U</li>
<li><a href="http://uima.apache.org/" title="Framework and annotators for unstructured information analysis">UIMA</a></li>
<li><a href="http://unomi.apache.org/" title="providing a reference implementation of the OASIS Customer Data Platform specification currently being worked on by the OASIS Context Server Technical Committee">Unomi</a></li>
<li><a href="http://usergrid.apache.org/" title="The BaaS Framework you run">Usergrid</a></li>
<li class="letter-header">V</li>
<li><a href="http://vcl.apache.org/" title="Virtual Computing Lab">VCL</a></li>
<li><a href="http://velocity.apache.org/" title="A Java Templating Engine">Velocity</a></li>
<li class="letter-header">W</li>
<li><a href="http://ws.apache.org/" title="Projects related to Web Services">Web Services</a></li>
<li><a href="http://whimsical.apache.org/" title="Tools that help automate various administrative tasks or information lookup activities">Whimsy</a></li>
<li><a href="http://wicket.apache.org/" title="Component-based Java Web Application Framework.">Wicket</a></li>
<li class="letter-header">X</li>
<li><a href="http://xmlgraphics.apache.org/" title="Conversion from XML to graphical output">XML Graphics</a></li>
<li><a href="http://xalan.apache.org/" title="XSLT processors in Java and C++">Xalan</a></li>
<li><a href="http://xerces.apache.org/" title="XML parsers in Java, C++ and Perl">Xerces</a></li>
<li class="letter-header">Y</li>
<li><a href="http://yetus.apache.org/" title="Collection of libraries and tools that enable contribution and release processes for software projects">Yetus</a></li>
<li class="letter-header">Z</li>
<li><a href="http://zeppelin.apache.org/" title="A web-based notebook that enables interactive data analytics">Zeppelin</a></li>
<li><a href="http://zookeeper.apache.org/" title="Centralized service for maintaining configuration information">ZooKeeper</a></li>
</ul>
</div>
</div>
</div>
</div>
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